We stayed at the cafe for a few days. The room was modern and the aircon was the best we had during our few weeks in Thailand. The staff was sweet and the place was clean.
However, the street in front of the cafe is extremely busy and noisy. At first the chaos is fun, but it will start to wear on you after a few days when you get bombarded with the traffic as soon as you set foot outside.
Breakfast was a bread roll with some kind of cream cheese and a black coffee or tea. For any other coffee you need to pay a bit extra. We only had breakfast there once and instead opted to eat at one of the many food stands in the area.
The location is reasonable. Some things are within walking distance or you could take a bus from the bus stop across the street or around the corner. The bus goes directly to the Grand Palace. We also used Grab quite a bit to get around.
All in all it was a nice stay, the room is lovely, just don’t expect a nice view ;)